/*
 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

/* $Id: dhcid_49.c,v 1.12 2020/02/26 18:47:59 florian Exp $ */

/* RFC 4701 */

#ifndef RDATA_IN_1_DHCID_49_C
#define RDATA_IN_1_DHCID_49_C 1

static inline isc_result_t
totext_in_dhcid(ARGS_TOTEXT) {
	isc_region_t sr, sr2;
	char buf[sizeof(" ; 64000 255 64000")];
	size_t n;

	REQUIRE(rdata->type == dns_rdatatype_dhcid);
	REQUIRE(rdata->rdclass == dns_rdataclass_in);
	REQUIRE(rdata->length != 0);

	dns_rdata_toregion(rdata, &sr);
	sr2 = sr;

	if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
		RETERR(isc_str_tobuffer("( " /*)*/, target));
	if (tctx->width == 0)   /* No splitting */
		RETERR(isc_base64_totext(&sr, 60, "", target));
	else
		RETERR(isc_base64_totext(&sr, tctx->width - 2,
					 tctx->linebreak, target));
	if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0) {
		RETERR(isc_str_tobuffer(/* ( */ " )", target));
		if (rdata->length > 2) {
			n = snprintf(buf, sizeof(buf), " ; %u %u %u",
				     sr2.base[0] * 256U + sr2.base[1],
				     sr2.base[2], rdata->length - 3U);
			INSIST(n < sizeof(buf));
			RETERR(isc_str_tobuffer(buf, target));
		}
	}
	return (ISC_R_SUCCESS);
}

static inline isc_result_t
fromwire_in_dhcid(ARGS_FROMWIRE) {
	isc_region_t sr;

	REQUIRE(type == dns_rdatatype_dhcid);
	REQUIRE(rdclass == dns_rdataclass_in);

	UNUSED(type);
	UNUSED(rdclass);
	UNUSED(dctx);
	UNUSED(options);

	isc_buffer_activeregion(source, &sr);
	if (sr.length == 0)
		return (ISC_R_UNEXPECTEDEND);

	isc_buffer_forward(source, sr.length);
	return (isc_mem_tobuffer(target, sr.base, sr.length));
}

static inline isc_result_t
towire_in_dhcid(ARGS_TOWIRE) {
	isc_region_t sr;

	REQUIRE(rdata->type == dns_rdatatype_dhcid);
	REQUIRE(rdata->rdclass == dns_rdataclass_in);
	REQUIRE(rdata->length != 0);

	UNUSED(cctx);

	dns_rdata_toregion(rdata, &sr);
	return (isc_mem_tobuffer(target, sr.base, sr.length));
}

#endif	/* RDATA_IN_1_DHCID_49_C */